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JEE CHEMISTRY MCQ: P-BLOCK ELEMENTS

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Assertion: Conc.

\mathrm{H}_2 \mathrm{SO}_4

on addition to

\mathrm{HCOOH}

liberates

\mathrm{CO}

.

Reason: Hot conc.

\mathrm{H}_2 \mathrm{SO}_4

is a moderate oxidising agent.

View answer and explanation

Correct option: B

If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion

Option B (If both Assertion & Reason are True but Reason is not a correct explanation of the Assertion) is correct because concentrated H2SO4 dehydrates formic acid to produce CO, and while H2SO4 can act as an oxidizing agent, the reaction proceeds via dehydration.

More Questions from P-BLOCK ELEMENTS

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The gas used for inflating the tyres of aeroplanes is: Which of the following is correct stability order of oxides of

17^{\text {th }}

group elements is: Assertion: Ozone is a powerful oxidising agent in comparison to

{O}_2

.

Reason: Ozone is diamagnetic but

{O}_2

is paramagnetic. Which of the following is kept in water?

\mathrm{C}{\mathrm{N}^ - }

{\mathrm{N}_2}

are isoelectronic but in contrast to

\mathrm{C}{\mathrm{N}^ - },\mathrm{\;}{\mathrm{N}_2}

is chemically inert because of: Consider the following statements

(i) Reaction

2 {Fe}^{3+}+{SO}_2+2 {H}_2 {O} \rightarrow 2 {Fe}^{2+}+{SO}_4^{2-}+4 {H}^{+}

shows reducing character of sulphur dioxide

(ii)

{H}_2 {~S}_2 {O}_8

{S}={O}

{S}-{OH}

{O}-

{O}

{NH}_3

gas can be dried effectively by using conc.

{H}_2 {SO}_4

.

(iv) One of the major use of

{H}_2 {SO}_4

is in the manufacture of fertilizers.

Which of the following is the correct code for the statements above?